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  <title>Reserved attributes</title>
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<h1 style="text-align: center;">Reserved attributes</h1>







The following attributes have special meanings and are reserved for the system. The names are case sensitive.<br>
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<div style="text-align: justify;"><span style="font-weight: bold;">Toplevel</span> : when associated with a
composite component, indicates that it is the level-zero component of the
project. There can be more than one such component, and they are the starting point for code generation.<br>







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<span style="font-weight: bold;">ISEM </span>: associates a composite component with an interaction semantics.<br>







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<span style="font-weight: bold;">delayed</span>:&nbsp;depending on the associated ISem that governs the component, this attribute has different meanings:<br>
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&nbsp;&nbsp;&nbsp; DE: associated to an output port, indicates that all
events produced by this port will allways be into the future.<br>
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&nbsp; &nbsp; DF: associated to an output port, indicates that data is procuded at the initialization step.<br>
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<span style="font-weight: bold;">nonstrict</span>: under the SR ISem, indicates that the associated component is Non-Strict.
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